#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""Input handling for Storm Games.

Provides functionality for:
- Text input dialogs
- Game pause functionality
- Exit handling
"""

import pygame
import time
from .speech import speak

def get_input(prompt="Enter text:", text=""):
    """Display an accessible text input dialog using pygame.

    Features:
    - Speaks each character as typed
    - Left/Right arrows navigate and speak characters
    - Up/Down arrows read full text content
    - Backspace announces deletions
    - Enter submits, Escape cancels
    - Fully accessible without screen reader dependency

    Args:
        prompt (str): Prompt text to display (default: "Enter text:")
        text (str): Initial text in input box (default: "")

    Returns:
        str: User input text, or None if cancelled
    """
    
    # Initialize text buffer and cursor
    text_buffer = list(text)  # Use list for easier character manipulation
    cursor_pos = len(text_buffer)  # Start at end of initial text
    
    # Announce the prompt and initial text as a single message
    if text:
        message = f"{prompt} Default text: {text}"
    else:
        message = f"{prompt} Empty text field"
    speak(message)
    
    # Speak initial cursor position
    if cursor_pos == 0:
        speak("Beginning of text")
    elif cursor_pos == len(text_buffer):
        speak("End of text")
    else:
        speak(f"At character: {text_buffer[cursor_pos]}")
    
    # Main input loop
    while True:
        event = pygame.event.wait()
        
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_RETURN:
                # Submit the input
                result = ''.join(text_buffer)
                speak(f"Submitted: {result if result else 'empty'}")
                return result
                
            elif event.key == pygame.K_ESCAPE:
                # Cancel input
                speak("Cancelled")
                return None
                
            elif event.key == pygame.K_BACKSPACE:
                # Delete character before cursor
                if cursor_pos > 0:
                    deleted_char = text_buffer.pop(cursor_pos - 1)
                    cursor_pos -= 1
                    speak(f"{deleted_char} deleted")
                else:
                    speak("Nothing to delete")
                    
            elif event.key == pygame.K_DELETE:
                # Delete character at cursor
                if cursor_pos < len(text_buffer):
                    deleted_char = text_buffer.pop(cursor_pos)
                    speak(f"{deleted_char} deleted")
                else:
                    speak("Nothing to delete")
                    
            elif event.key == pygame.K_LEFT:
                # Move cursor left and speak character
                if cursor_pos > 0:
                    cursor_pos -= 1
                    if cursor_pos == 0:
                        speak("Beginning of text")
                    else:
                        speak(text_buffer[cursor_pos])
                else:
                    speak("Beginning of text")
                    
            elif event.key == pygame.K_RIGHT:
                # Move cursor right and speak character
                if cursor_pos < len(text_buffer):
                    speak(text_buffer[cursor_pos])
                    cursor_pos += 1
                    if cursor_pos == len(text_buffer):
                        speak("End of text")
                else:
                    speak("End of text")
                    
            elif event.key == pygame.K_UP or event.key == pygame.K_DOWN:
                # Read entire text content
                if text_buffer:
                    speak(''.join(text_buffer))
                else:
                    speak("Empty text field")
                    
            elif event.key == pygame.K_HOME:
                # Move to beginning
                cursor_pos = 0
                speak("Beginning of text")
                
            elif event.key == pygame.K_END:
                # Move to end
                cursor_pos = len(text_buffer)
                speak("End of text")
                
            else:
                # Handle regular character input
                if event.unicode and event.unicode.isprintable():
                    char = event.unicode
                    # Insert character at cursor position
                    text_buffer.insert(cursor_pos, char)
                    cursor_pos += 1
                    
                    # Speak the character name
                    if char == ' ':
                        speak("space")
                    elif char == '\\':
                        speak("backslash")
                    elif char == '/':
                        speak("slash")
                    elif char == '!':
                        speak("exclamation mark")
                    elif char == '"':
                        speak("quotation mark")
                    elif char == '#':
                        speak("hash")
                    elif char == '$':
                        speak("dollar sign")
                    elif char == '%':
                        speak("percent")
                    elif char == '&':
                        speak("ampersand")
                    elif char == "'":
                        speak("apostrophe")
                    elif char == '(':
                        speak("left parenthesis")
                    elif char == ')':
                        speak("right parenthesis")
                    elif char == '*':
                        speak("asterisk")
                    elif char == '+':
                        speak("plus")
                    elif char == ',':
                        speak("comma")
                    elif char == '-':
                        speak("minus")
                    elif char == '.':
                        speak("period")
                    elif char == ':':
                        speak("colon")
                    elif char == ';':
                        speak("semicolon")
                    elif char == '<':
                        speak("less than")
                    elif char == '=':
                        speak("equals")
                    elif char == '>':
                        speak("greater than")
                    elif char == '?':
                        speak("question mark")
                    elif char == '@':
                        speak("at sign")
                    elif char == '[':
                        speak("left bracket")
                    elif char == ']':
                        speak("right bracket")
                    elif char == '^':
                        speak("caret")
                    elif char == '_':
                        speak("underscore")
                    elif char == '`':
                        speak("grave accent")
                    elif char == '{':
                        speak("left brace")
                    elif char == '|':
                        speak("pipe")
                    elif char == '}':
                        speak("right brace")
                    elif char == '~':
                        speak("tilde")
                    else:
                        # For regular letters, numbers, and other characters
                        speak(char)
        
        # Allow other events to be processed
        pygame.event.pump()

def pause_game():
    """Pauses the game until user presses backspace."""
    speak("Game paused, press backspace to resume.")
    pygame.event.clear()
    try:
        pygame.mixer.pause()
    except:
        pass

    try:
        pygame.mixer.music.pause()
    except:
        pass

    while True:
        event = pygame.event.wait()
        if event.type == pygame.KEYDOWN and event.key == pygame.K_BACKSPACE: 
            break

    try:
        pygame.mixer.unpause()
    except:
        pass

    try:
        pygame.mixer.music.unpause()
    except:
        pass

    pygame.event.pump()

def check_for_exit():
    """Check if user has pressed escape key.

    Returns:
        bool: True if escape was pressed, False otherwise
    """
    for event in pygame.event.get():
        if event.type == pygame.KEYDOWN and event.key == pygame.K_ESCAPE:
            return True
        return False
    pygame.event.pump()